James Webb Telescope reveals 2,500 hidden oldest galaxies in iconic Hubble Field

NASA telescope captures deepest mid-infrared image ever seen (Image: NASA)

Staring into the stars often brings quiet wonder. But sometimes, it brings answers. NASA’s James Webb Space Telescope has now revisited one of space science’s most famous views, revealing more than ever before.

What is the Ultra Deep Field?
The Hubble Ultra Deep Field once showed galaxies in a spot that looked empty. But Webb has returned to this tiny patch of sky with a sharper eye. Using its Mid-Infrared Instrument, or MIRI, it spent nearly 100 hours watching. This deep look marks the longest time Webb has focused on one filter.

The observation zone is part of the MIRI Deep Imaging Survey. It offers one of the most detailed mid-infrared views of space. Webb also used its Near-Infrared Camera to add more depth to the data. These tools let astronomers study how galaxies formed over billions of years.

Hello deep field, our old friend. We've come to look at you again! 👋

We last saw this region through @NASAHubble’s eyes. Webb’s view uncovers previously hidden galaxies and offers new insights into the formation of the first cosmic structures.https://t.co/WQpzSem4Oy pic.twitter.com/bQMo0fpH4W

— NASA Webb Telescope (@NASAWebb) August 1, 2025

Webb’s detailed vision lets scientists see the structure of these systems. It helps track how they spread energy and light. This offers clues to how galaxies grow and change over time.

Why are colours important?
Each colour in the image tells a story. Red and orange galaxies shine with mid-infrared light. This hints at dust, star-making activity or glowing central regions. Greenish-white galaxies are much older and further away. Their light has stretched as the Universe expanded. Blue and cyan shades point to closer galaxies seen in near-infrared light.

What makes this image special?
This marks Webb’s deepest-ever look at an extragalactic field. It builds on Hubble’s work but adds more detail and depth. Scientists can now study galaxy evolution with new clarity. The image reveals ancient systems that were once hidden from view.

Webb’s revisit to this field shows how far space science has come. It also proves that the Universe still holds countless stories waiting to be told.